After struggling to find mounts that fit my FX I've finally found that Sportsmatch are good.The ones that come with my new MTC scope don't line up so now I have to get some 30mm ones.At least the're cheaper than BKL's.

I use Sportsmatch but have had the occasional pair that showed crossover I now fit them to the dovetail together (butted-up to each other) & run my finger thro' the scope rings to feel for any mis-alignment. It's surprising how sensitive/precise the human finger can be